[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[patch #5583] NPAR TESTS
From: |
Jason H Stover |
Subject: |
[patch #5583] NPAR TESTS |
Date: |
Fri, 15 Dec 2006 22:12:38 +0000 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.8) Gecko/20061025 Firefox/1.5.0.8 |
Follow-up Comment #9, patch #5583 (project pspp):
Your p-value of 1.0 below is ifne, though it does point to a
quirk of p-values. The p-value of 1.0 means this: Under the hypothesis that
the distribution of the sexes is equal, the probability
of seeing a "more extreme" test statistic than 10 males/10 females is 1.0.
Perhaps it should be
1-Pr(10 males) = 1 - (20 choose 10) * (1/2048)
...but that isn't how p-values are defined. They are defined to
include the observed value of the test statistic in their computation, so we
have a p-value of
Pr ({less than or equal to 10 males} \cup {more than 10 males})
...which is 1.0 for a binomial random variable with 20 trials and
null hypothesis success probability of 0.5.
_______________________________________________________
Reply to this item at:
<http://savannah.gnu.org/patch/?5583>
_______________________________________________
Message sent via/by Savannah
http://savannah.gnu.org/
- [patch #5583] NPAR TESTS, Jason H Stover, 2006/12/07
- Re: [patch #5583] NPAR TESTS, John Darrington, 2006/12/08
- [patch #5583] NPAR TESTS, John Darrington, 2006/12/09
- [patch #5583] NPAR TESTS, John Darrington, 2006/12/10
- [patch #5583] NPAR TESTS, John Darrington, 2006/12/11
- [patch #5583] NPAR TESTS, Jason H Stover, 2006/12/15
- [patch #5583] NPAR TESTS,
Jason H Stover <=
- [patch #5583] NPAR TESTS, John Darrington, 2006/12/15
- [patch #5583] NPAR TESTS, Jason H Stover, 2006/12/16
- [patch #5583] NPAR TESTS, Ben Pfaff, 2006/12/16
- [patch #5583] NPAR TESTS, John Darrington, 2006/12/19
- [patch #5583] NPAR TESTS, Jason H Stover, 2006/12/19
- [patch #5583] NPAR TESTS, Ben Pfaff, 2006/12/19
- [patch #5583] NPAR TESTS, John Darrington, 2006/12/20
- Re: [patch #5583] NPAR TESTS, John Darrington, 2006/12/16
- Re: [patch #5583] NPAR TESTS, Jason Stover, 2006/12/18
- Re: [patch #5583] NPAR TESTS, John Darrington, 2006/12/18